diff --git a/LibManagementSystem/borrow.cpp b/LibManagementSystem/borrow.cpp
index 8971e7acaa44a60de9fb5f5cb7e3e995dd9ac040..92576f44b16826db8fb48c23405af01e808d3e09 100644
--- a/LibManagementSystem/borrow.cpp
+++ b/LibManagementSystem/borrow.cpp
@@ -19,7 +19,7 @@ borrow::~borrow()
 void borrow::on_enter_btn_clicked()
 {
     QByteArray msg;
-    char t = (char)130;
+    char t = '^';
     msg += "BORROW" + ui->no_edit->text().toStdString() + t + "dj21311256";
     emit send(msg);
 }
@@ -31,6 +31,7 @@ void borrow::fail(QString failmsg)
     box->setWindowTitle("借书失败");
     box->setText(failmsg);
     box->show();
+    box->setAttribute(Qt::WA_DeleteOnClose);
 }
 
 void borrow::receive()
@@ -40,6 +41,7 @@ void borrow::receive()
     box->setWindowTitle("提示");
     box->setText("借书成功!");
     box->show();
+    box->setAttribute(Qt::WA_DeleteOnClose);
 }
 
 void borrow::on_return_btn_clicked()
diff --git a/LibManagementSystem/login.cpp b/LibManagementSystem/login.cpp
index ed22b6f72f4fcdc52e047bd97aca512e5175e4cd..ac30b498d2c92121e340c59a6fe2cb481b10f1e0 100644
--- a/LibManagementSystem/login.cpp
+++ b/LibManagementSystem/login.cpp
@@ -25,7 +25,7 @@ login::~login()
 void login::on_loginBtn_clicked()
 {
     QByteArray msg;
-    char t = (char)130;
+    char t = '^';
     msg += "ACCONT2" + ui->accountlineEdit->text().trimmed().toStdString() + t + ui->passwordlabel->text().trimmed().toStdString();
     emit send_login(msg);
 }
@@ -50,6 +50,7 @@ void login::fail_login(QString failmsg)
     box->setWindowTitle("登陆失败");
     box->setText(failmsg);
     box->show();
+    box->setAttribute(Qt::WA_DeleteOnClose);
 }
 
 void login::receive_login()
@@ -59,6 +60,7 @@ void login::receive_login()
     box->setWindowTitle("提示");
     box->setText("登陆成功!点击OK返回主页面!");
     box->show();
+    box->setAttribute(Qt::WA_DeleteOnClose);
     emit open_main();
 }
 
@@ -69,6 +71,7 @@ void login::fail_regis(QString failmsg)
     box->setWindowTitle("注册失败");
     box->setText(failmsg);
     box->show();
+    box->setAttribute(Qt::WA_DeleteOnClose);
 }
 
 void login::receive_regis()
@@ -79,6 +82,7 @@ void login::receive_regis()
     box->setWindowTitle("提示");
     box->setText("注册成功!");
     box->show();
+    box->setAttribute(Qt::WA_DeleteOnClose);
 }
 
 void login::on_registerBtn_clicked()
diff --git a/LibManagementSystem/regis.cpp b/LibManagementSystem/regis.cpp
index 870b309ff998d5ce6154220e6da46130b7658bdd..32dacee285f89edaf7c3ea6c6cb04099c40c4cc8 100644
--- a/LibManagementSystem/regis.cpp
+++ b/LibManagementSystem/regis.cpp
@@ -55,6 +55,7 @@ void regis::on_confirm_clicked()
         box->setWindowTitle("注册失败");
         box->setText("还有信息未填写!");
         box->show();
+        box->setAttribute(Qt::WA_DeleteOnClose);
         return;
     }
     if(phone.size() < 11 ){
@@ -63,6 +64,7 @@ void regis::on_confirm_clicked()
         box->setWindowTitle("注册失败");
         box->setText("电话号码格式不正确!");
         box->show();
+        box->setAttribute(Qt::WA_DeleteOnClose);
         return;
     }
     int is_at;
@@ -73,6 +75,7 @@ void regis::on_confirm_clicked()
         box->setWindowTitle("注册失败");
         box->setText("邮箱格式不正确!");
         box->show();
+        box->setAttribute(Qt::WA_DeleteOnClose);
         return;
     }
     if(firstpas.size() < 6){
@@ -81,6 +84,7 @@ void regis::on_confirm_clicked()
         box->setWindowTitle("注册失败");
         box->setText("密码长度过短,请设置至少6位!");
         box->show();
+        box->setAttribute(Qt::WA_DeleteOnClose);
         return;
     }
     if(firstpas != secondpas){
@@ -89,12 +93,14 @@ void regis::on_confirm_clicked()
         box->setWindowTitle("注册失败");
         box->setText("两次输入密码不一致!");
         box->show();
+        box->setAttribute(Qt::WA_DeleteOnClose);
         return;
     }
 
     QByteArray msg;
-    msg+= "ACCONT1" + acc.toStdString() + char(130) + nick.toStdString() + char(130) + secondpas.toStdString() + char(130)
-            + sex.toStdString() + char(130) + phone.toStdString() + char(130) + mail.toStdString();
+    char t = '^';
+    msg+= "ACCONT1" + acc.toStdString() + t + nick.toStdString() + t + secondpas.toStdString() + t
+            + sex.toStdString() + t + phone.toStdString() + t + mail.toStdString();
     emit confirm(msg);
 }
 
@@ -105,6 +111,7 @@ void regis::fail(QString failmsg)
     box->setWindowTitle("注册失败");
     box->setText(failmsg);
     box->show();
+    box->setAttribute(Qt::WA_DeleteOnClose);
 }
 
 void regis::receive()
@@ -114,6 +121,7 @@ void regis::receive()
     box->setWindowTitle("提示");
     box->setText("注册成功!");
     box->show();
+    box->setAttribute(Qt::WA_DeleteOnClose);
     this->close();
 }
 
diff --git a/LibManagementSystem/search.cpp b/LibManagementSystem/search.cpp
index f0da217b48e34d7babe4d31c70d5226f80d27877..413ab0f4af577c6ec9c07d5ab44fe65b2b6a2c53 100644
--- a/LibManagementSystem/search.cpp
+++ b/LibManagementSystem/search.cpp
@@ -53,7 +53,7 @@ void search::on_search_2_clicked()
     QString a=ui->bname->text();
     QString b=ui->bauthor->text();
     QString c=ui->bpress->text();
-    char t = (char)130;
+    char t = '^';
     QByteArray m;
     m+="SEARCH"+a.toStdString()+t+b.toStdString()+t+c.toStdString()+t+d.toStdString();
     emit send(m);